1. What is the purpose of function pointers, and how are they used?
2. Explain the concept of dynamic memory allocation in C.
3. What are the differences between malloc, calloc, and realloc?
4. How do you implement a linked list using pointers?
5. What is the difference between a singly linked list and a doubly linked list?
6. How do you create and manipulate a binary tree in C?
7. What is the concept of recursion, and when should it be used?
8. Explain the importance of the volatile keyword in C.
9. What are the differences between struct and union in C?
10. How do you implement a stack using an array and a linked list?
11. What is a queue, and how do you implement it using an array?
12. How do you handle multi-dimensional arrays in C?
13. What are the differences between passing by value and passing by reference?
14. How do you implement function overloading in C using function pointers?
15. What is a hash table, and how can it be implemented in C?
16. Explain the concept of a static library versus a dynamic library.
17. How do you use typedef to create a new data type in C?
18. What is the significance of the extern keyword in variable declarations?
19. How do you implement a circular linked list?
20. What is a binary search tree (BST), and how do you perform insertion and deletion?
21. How do you write a program to sort an array using quicksort?
22. What is the purpose of the sizeof operator, and how does it work with different data types?
23. Explain how to use macros and preprocessor directives in C.
24. What is the difference between #include and #define in header files?
25. How do you handle file operations in C, including reading and writing files?
26. What is the purpose of the fopen, fclose, fread, and fwrite functions?
27. How do you use the fprintf and fscanf functions for formatted file input and output?
28. What are the differences between text files and binary files?
29. How do you implement error handling for file operations in C?
30. What is the purpose of the errno variable, and how is it used?
31. How do you implement a binary search algorithm in C?
32. What is a sorting algorithm, and how do you implement bubble sort in C?
33. How do you implement a function that returns a pointer?
34. What is the role of the const keyword in function parameters?
35. Explain the concept of bitwise operators and their use cases.
36. How do you implement a basic calculator using function pointers?
37. What is a semaphore, and how is it used for process synchronization?
38. Explain how to create and use threads in C using the pthread library.
39. What are critical sections, and how do you manage them in a multithreaded environment?
40. How do you implement a producer-consumer problem using semaphores?